diff options
Diffstat (limited to 'tex/context/base/mkiv/font-dsp.lua')
| -rw-r--r-- | tex/context/base/mkiv/font-dsp.lua | 159 |
1 files changed, 136 insertions, 23 deletions
diff --git a/tex/context/base/mkiv/font-dsp.lua b/tex/context/base/mkiv/font-dsp.lua index e6679fda2..79749741c 100644 --- a/tex/context/base/mkiv/font-dsp.lua +++ b/tex/context/base/mkiv/font-dsp.lua @@ -1478,6 +1478,118 @@ end -- [false] = { [true] = { false, true }, [false] = { false } }, -- } +-- function gposhandlers.pair(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs) +-- local tableoffset = lookupoffset + offset +-- setposition(f,tableoffset) +-- local subtype = readushort(f) +-- local getdelta = fontdata.temporary.getdelta +-- if subtype == 1 then +-- local coverage = readushort(f) +-- local format1 = readushort(f) +-- local format2 = readushort(f) +-- local sets = readarray(f) +-- sets = readpairsets(f,tableoffset,sets,format1,format2,mainoffset,getdelta) +-- coverage = readcoverage(f,tableoffset + coverage) +-- local shared = { } -- partial sparse, when set also needs to be handled in the packer +-- for index, newindex in next, coverage do +-- local set = sets[newindex+1] +-- local hash = { } +-- for i=1,#set do +-- local value = set[i] +-- if value then +-- local other = value[1] +-- if shared then +-- local s = shared[value] +-- if s == nil then +-- local first = value[2] +-- local second = value[3] +-- if first or second then +-- s = { first, second or nil } -- needs checking +-- else +-- s = false +-- end +-- shared[value] = s +-- end +-- hash[other] = s or nil +-- else +-- local first = value[2] +-- local second = value[3] +-- if first or second then +-- hash[other] = { first, second or nil } -- needs checking +-- else +-- hash[other] = nil -- what if set, maybe warning +-- end +-- end +-- end +-- end +-- coverage[index] = hash +-- end +-- return { +-- shared = shared and true or nil, +-- format = "pair", +-- coverage = coverage, +-- } +-- elseif subtype == 2 then +-- local coverage = readushort(f) +-- local format1 = readushort(f) +-- local format2 = readushort(f) +-- local classdef1 = readushort(f) +-- local classdef2 = readushort(f) +-- local nofclasses1 = readushort(f) -- incl class 0 +-- local nofclasses2 = readushort(f) -- incl class 0 +-- local classlist = readpairclasssets(f,nofclasses1,nofclasses2,format1,format2,tableoffset,getdelta) +-- coverage = readcoverage(f,tableoffset+coverage) +-- classdef1 = readclassdef(f,tableoffset+classdef1,coverage) +-- classdef2 = readclassdef(f,tableoffset+classdef2,nofglyphs) +-- local usedcoverage = { } +-- local shared = { } -- partial sparse, when set also needs to be handled in the packer +-- for g1, c1 in next, classdef1 do +-- if coverage[g1] then +-- local l1 = classlist[c1] +-- if l1 then +-- local hash = { } +-- for paired, class in next, classdef2 do +-- local offsets = l1[class] +-- if offsets then +-- local first = offsets[1] +-- local second = offsets[2] +-- if first or second then +-- if shared then +-- local s1 = shared[first] +-- if s1 == nil then +-- s1 = { } +-- shared[first] = s1 +-- end +-- local s2 = s1[second] +-- if s2 == nil then +-- s2 = { first, second or nil } +-- s1[second] = s2 +-- end +-- hash[paired] = s2 +-- else +-- hash[paired] = { first, second or nil } +-- end +-- else +-- -- upto the next lookup for this combination +-- end +-- end +-- end +-- usedcoverage[g1] = hash +-- end +-- end +-- end +-- return { +-- shared = shared and true or nil, +-- format = "pair", +-- coverage = usedcoverage, +-- } +-- elseif subtype == 3 then +-- report("yet unsupported subtype %a in %a positioning",subtype,"pair") +-- else +-- report("unsupported subtype %a in %a positioning",subtype,"pair") +-- end +-- end + function gposhandlers.pair(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofglyphs) local tableoffset = lookupoffset + offset setposition(f,tableoffset) @@ -1490,25 +1602,32 @@ function gposhandlers.pair(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofgly local sets = readarray(f) sets = readpairsets(f,tableoffset,sets,format1,format2,mainoffset,getdelta) coverage = readcoverage(f,tableoffset + coverage) + local shared = { } -- partial sparse, when set also needs to be handled in the packer for index, newindex in next, coverage do local set = sets[newindex+1] local hash = { } for i=1,#set do local value = set[i] if value then - local other = value[1] - local first = value[2] - local second = value[3] - if first or second then - hash[other] = { first, second or nil } -- needs checking - else - hash[other] = nil -- what if set, maybe warning + local other = value[1] + local share = shared[value] + if share == nil then + local first = value[2] + local second = value[3] + if first or second then + share = { first, second or nil } -- needs checking + else + share = false + end + shared[value] = share end + hash[other] = share or nil -- really overload ? end end coverage[index] = hash end return { + shared = shared and true or nil, format = "pair", coverage = coverage, } @@ -1537,23 +1656,17 @@ function gposhandlers.pair(f,fontdata,lookupid,lookupoffset,offset,glyphs,nofgly local first = offsets[1] local second = offsets[2] if first or second then - if shared then - local s1 = shared[first] - if s1 == nil then - s1 = { } - shared[first] = s1 - end - local s2 = s1[second] - if s2 == nil then - s2 = { first, second or nil } - s1[second] = s2 - end - hash[paired] = s2 - else - hash[paired] = { first, second or nil } + local s1 = shared[first] + if s1 == nil then + s1 = { } + shared[first] = s1 end - else - -- upto the next lookup for this combination + local s2 = s1[second] + if s2 == nil then + s2 = { first, second or nil } + s1[second] = s2 + end + hash[paired] = s2 end end end |